
3 Bedroom Apartments for Rent in St Marys, ON (39 Rentals)


The Wynbrook

Somerset Place Apartments

675 Richmond Street

Richmond Square
Renting with Roommates: Realistic Expectations for Shared Lease
Sharing a lease? Learn how to set clear expectations with your roommates on routines, bills, and cleaning to ensure a successful and peaceful shared living arrangement.

Rittenhouse Place

Gordon Avenue

939 Western

Kingswell Towers

Alto Towers

Total Monthly Price
The Dorchester

190 Cherryhill Cir

Total Monthly Price
The Whitehall
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When searching for a roommate, follow this list of essential steps and set clear expectations to create a solid foundation for a harmonious living situation.

396 Queens Avenue

Parkdale Place

89 Greenwood Dr

Park Place

316 Rosenberg Wy

67 Karen Walk

520 Egerton St

77 Dalegrove Dr
Renting Smart: Lease Basics Every Renter Needs
Demystify Your Rental Lease. Learn the basics about renting, deposits, and tenant/landlord responsibilities. Rent smart and avoid surprises. | Renter University at ApartmentHomeLiving.com

40 Marlboro Crt

55 Mooregate Crescent

38 Langton Rd

499 Beechwood Dr

102 Patience Crescent

970 Creekside Dr

45 Gatewood Pl

520 Parkside Dr

Kappele Circle
The Art of the Rental Viewing: What to look for during a property tour
Touring a rental? This guide helps you know exactly what to look for, from safety features to hidden flaws, so you can confidently sign your lease or keep searching.

Beacon Tower

Sunnydale

Aqui on King
St Marys, ON Local Guide
How much does it cost to rent an apartment in St Marys?
| Bedroom | Average Rent | Cheapest Rent | Highest Rent |
|---|---|---|---|
| St Marys Studio Apartments | $1,370 | $1,049 | $1,641 |
| St Marys 1 Bedroom Apartments | $1,687 | $1,099 | $2,870 |
| St Marys 2 Bedroom Apartments | $2,142 | $1,225 | $3,386 |
| St Marys 3 Bedroom Apartments | $2,607 | $1,625 | $4,175 |
| St Marys 4 Bedroom Apartments | $987 | $929 | $1,044 |
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St Marys, ON Local Guide
- Nearby Cities
Largest Available St Marys and Nearby 3 Bedroom Apartments
The largest available 3 Bedroom apartment unit in St Marys, ON is found at 180 Mill Street and is 1,962 square feet priced from $3,395. 190 Cherryhill Cir has the second largest 3 Bedroom, which is sized at 1,830 square feet and currently listed start at $2,799. Here is today’s list of the largest available 3 Bedroom units in St Marys:
| Apartment Listing | Model Name | Square Footage | Priced From |
|---|---|---|---|
| 180 Mill Street | 3 Bedroom + 3 Bath | 1,962 Sq Ft | $3,395 |
| 190 Cherryhill Cir | Three Bedroom Pent House | 1,830 Sq Ft | $2,799 |
| 100 Fullarton Street | Eclipse | 1,606 Sq Ft | $4,175 |
| Beacon Tower | Three Bedroom | 1,500 Sq Ft | $2,450 |
| Sunnydale | 3 Bedroom(s) and 1.5 Bathroom(s) | 1,500 Sq Ft | $2,650 |
| Alto Towers | 3 Beds, 1 Baths | 1,410 Sq Ft | $3,495 |
| 675 Richmond Street | 3 Bedroom | 1,386 Sq Ft | $2,844 |
| Clarence Square | 3 Bed, 2 Bath - Dundas Penthouse | 1,374 Sq Ft | $3,800 |
| Revo on King St | Three Bedroom | 1,265 Sq Ft | $2,300 |
| Richmond Square | 3 Bedroom(s), and 2 Bathroom | 1,000 Sq Ft | $2,340 |
Cheapest Available St Marys and Nearby 3 Bedroom Apartments
As of May 30, 2026 the lowest priced 3 Bedroom apartment unit in St Marys, ON is the 3 Bedroom Model starting from $1,625 at Blossom Gate . The second most affordable St Marys 3 Bedroom is the 3 Bedroom Promotional Price For First 7 Months* Model at 939 Western starting at $1,842 . The average price for all 3 Bedroom apartments in St Marys is currently $2,607. Here is today’s list of the cheapest available 3 Bedroom options in St Marys:
| Apartment Listing | Model Name | Priced From |
|---|---|---|
| Blossom Gate | 3 Bedroom | $1,625 |
| 939 Western | 3 Bedroom Promotional Price For First 7 Months* | $1,842 |
| 520 Parkside Dr | Three Bedroom Apartment | $2,225 |
| Revo on King St | Three Bedroom | $2,300 |
| Richmond Square | 3 Bedroom(s), and 2 Bathroom | $2,340 |
| Beacon Tower | Three Bedroom | $2,450 |
| Somerset Place Apartments | 3 Bed 1.5 Bath A | $2,595 |
| Sunnydale | 3 Bedroom(s) and 1.5 Bathroom(s) | $2,650 |
| 180 Mill Street | 3 Bedroom + 2 Bath | $2,695 |
| SOHOSQ Rentals | SO3B02 | $2,750 |
Real Estate and Rental Term Glossary | ApartmentHomeLiving.com Renter University
From the letter A all the way to the letter Z, the Real Estate and Rental Term Glossary from the content team at ApartmentHomeLiving.com provides our visitors and shoppers with a little clarity and helpful guidance in navigating the real estate world through definitions and explainers for the top subjects and terms that someone may come across during the leasing, buying, or selling process.
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See the most popular apartments and homes in St Marys, ON
Frequently Asked Questions about 3 Bedroom St Marys Apartments
What is the Cheapest apartment in St Marys with 3 Bedroom?
Currently the most affordable 3 Bedroom in St Marys is at Blossom Gate listed at $1,625.
How much is the average rent for a 3 Bedroom St Marys Apartment?
The average rent for a 3 Bedroom Apartment in St Marys is $2,607.
What is the largest available 3 Bedroom St Marys Apartment for rent?
Today's apartment with the most square footage in St Marys is a 1,962 square feet unit starting from $3,395 at 180 Mill Street.
What is the average size for St Marys 3 Bedroom Apartments for rent?
The average size for a 3 Bedroom rental in St Marys is currently 1,100 sq ft.
Expert Rental Resources
The rental experts at ApartmentHomeLiving.com provide you with top advice, tools, and tips for understanding the leasing process and finding the perfect rental. Here are a few helpful rental and leasing articles from our experts to guide you on your search.
Articles, How-To's, and Tips

Neighborhood and Market Insights: How to Choose the Right Area to Rent
Written by: Robin Stewart
Apartment-hunting can be a gargantuan task. Renters have a wish list of items—some luxuries, some necessities—but finding what you seek in the right place is perhaps the most important part of the journey.

A Seasoned Property Manager's Step-by-Step Guide to Getting Your Deposit Back
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I’m going to talk with you as a seasoned property manager and friend. So, let’s start with your security deposit. I want you to think about this guide as insider information. You deserve your deposit back.

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This article draws from first-hand renter experiences and recurring financial challenges reported after moving in.





